The drama tells the story of a detective from the past who time-travels to the present day. The serial killer has resumed the killings that began 30 years ago and in order to catch him, the detective must team up with 2 other officers.

• Tunnel
• Choi Jin-Hyuk
• Yoon Hyun-Min
• Lee Yoo-Young
• Kim Seong-min-I
• Sin Yong-hwi